To install: Rename by removing the '.zip' from the filename (i.e., tebe@guid.softwarebychuck.com.xpi) and open with Thunderbird (File > Add-ons > (gear icon dropdown) > Install Add-on From File)

TEBE beta
NightliesThunderbird 3.0b1 - 3.1.*

TEBE is a backup extension for the Mozilla Thunderbird email
client. It is functionally very similar to the Firefox
FEBE
backup extension. A tutorial for getting started can be found
here.

Warning:
These are beta releases and may contain bugs (none too serious,
I hope). Ongoing
discussion in the
Support Forum. Please report bugs!
Note: You must have javascript enabled to install the
xpis from this page. All known bugs carry over unless
expressly mentioned as fixed.

Want to be notified when new builds are available? Here
are some options: